Older Kids · Ages 9–14

NumberSense

Ages 8–13 · Gr 3–8 Level 1

Guess first, then compute — a daily estimation workout that builds a real feel for numbers.

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NumberVerse

Ages 9–10 · Gr 4–5 Level 1

Build numbers from base-ten blocks, place and round on the number line, solve by jumping, subitize on a rekenrek, and practice place value, operations, factors, primes & integers across 12 kits.

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MeasureQuest

Ages 8–11 · Gr 3–6 Level 3

Read a ruler (even a broken one), balance a scale, convert units up and down the metric staircase, build shapes on a grid, graph your own data, and sharpen your estimates.

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Card-game number sense & card math

FractionForge

Ages 9–11 · Gr 4–6 Level 1

Build, place, and compare fractions with hands-on tools — bars, pies, and number lines.

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CardForge

Ages 9–12 · Gr 4–7 Level 2

Build runs and sets at the card table, predict how a card trick is forced, and practice 16 kits from the deck to combinatorics.

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Math / Financial Literacy

MintForge

Ages 9–13 · Gr 4–8 Level 3

Make the money math click: work compound interest, markup, and loan payments in the Money-Math Lab, balance a 50/30/20 budget under surprise costs, and practice financial literacy across 16 kits.

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Mathematics · Estimation and the middle of a crowd

TileTales

Ages 10–12 · Gr 5–7 Level 2

Dominoes as number sense — read the pips at a glance, add the open ends to a multiple of five to score. Race a graded bot or a friend on this device to 61 over a few hands, or play a friend online one Block hand at a time.

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Data Science

DataForge

Ages 9–12 · Gr 4–7 Level 3

Build data pipelines, chart the story, and test hypotheses on small datasets you can tidy and chart — plus 16 kits.

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SwarmQuest

Ages 10–13 · Gr 5–8 Level 3

A whole-room estimation game on one screen. Everyone looks at a picture for a few seconds, then points to their guess on a number line while the host taps it in. Then the truth and the room's middle guess drop together, and you see how close the crowd got. One room score, no names, nothing typed. For middle-school clubs and classes.

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Spatial Reasoning & 3-D Geometry

FermiForge

Ages 9–13 · Gr 4–8 Level 3

How many jelly beans fill that jar? How many breaths do you take in a day? You can guess almost anything — to within a power of ten — by breaking it into small pieces you CAN guess and multiplying. Meet Chunk, Bound, Round, Sanity and Unit, predict the order of magnitude, then watch your estimate land right next to the real answer. Real, tiny, deterministic maths — no calculator, no internet. Ages 9–14.

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Applied Math

TradeForge

Ages 9–13 · Gr 4–8 Level 3

A day on the job with twelve trades, for ages 9–14. The electrician sizing a circuit, the plumber’s slope, the baker’s ratio, the nurse’s dose — each worker is one piece of real math. You see a real job, GUESS the answer, then watch the worker compute it and explain. Applied arithmetic + a look at real careers. On-device, no accounts.

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VoxelForge

Ages 9–13 · Gr 4–8 Level 3

Turn 3-D shapes in your head and build them block by block — spot the true rotation (turned, not flipped) and stack a shape one flat layer at a time. A hands-on spatial-reasoning lab. Ages 9–14.

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Mathematics · Inventing a measure of spread

ChanceForge

Ages 10–12 · Gr 5–7 Level 2

Run coin, dice, and law-of-large-numbers experiments, then practice probability & statistics across 16 kits.

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InventForge

Ages 11–13 · Gr 6–8 Level 3

Which pitching machine is most reliable? Before any formula, invent your own measure of spread from parts, name it after yourself, and test it on new cases. Then meet the textbook's measure and see where the two disagree. Ages 9–14.

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RatioRealm

Ages 11–12 · Gr 6–7 Level 2

Scale ratios on a double number line, work recipe/map/blueprint scale problems, judge which mix is stronger, and practice ratio, rate, proportion & percent across 16 kits.

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EquationQuest

Ages 11–13 · Gr 6–8 Level 3

See algebra stay balanced — solve for x on a balance scale, combine like terms with algebra tiles, spot the slip in a worked solution, and practice early algebra across 16 kits.

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Math / Functions

FunctionForge

Ages 11–13 · Gr 6–8 Level 4

Step into the function workshop: feed numbers into a machine, watch what comes out, and crack the hidden rule. Build y = mx + b on a coordinate grid to match a target line, read slope and intercept off a graph, and try the vertical line test — then practice functions, tables, expressions, and pre-algebra across 16 kits. On-device; works with the sound off.

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CalendarForge

Ages 10–13 · Gr 5–8 Level 3

Why does Tết move? Why does Ramadan slide earlier every year? Because the sun and the moon keep two clocks that don’t divide evenly — and you can do the arithmetic. Predict how far a solar, a lunar and a lunisolar calendar drift against the seasons, see the arithmetic, then drift any calendar across the centuries in the Calendar lab. Real, tiny, deterministic maths — no internet. Ages 9–14.

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SpokeForge

Ages 10–13 · Gr 5–8 Level 3

How does a bicycle turn one push of your legs into a wheel spinning four times over? Gears. The front teeth divided by the rear teeth is the gear ratio — how many wheel turns you get per pedal — and it sets everything: how hard the pedals are, how far one push carries you, how fast you go. Predict the ratio, then build your own gear in the workshop. Real, tiny, deterministic maths — no internet. Ages 9–14.

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GeometryForge

Ages 11–13 · Gr 6–8 Level 3

Make angles with a live protractor, build polygons and reason about their angle sums, slide/flip/turn shapes on a grid, find lines of symmetry, and stretch a geoboard to an exact area — plus 17 kits of geometry.

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Mathematics

BridgeForge

Ages 10–12 · Gr 5–7 Level 3

Build bridges between math and everything else. Match a math idea — ratio, symmetry, rate, probability — to the real-world moment in art, music, science, sport or code that actually uses it. Plus cross-curricular Concepts checks. Ages 9–14.

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Math · Ratio & Percent (through your own sports times)

MathCircle

Ages 11–13 · Gr 6–8 Level 5

Solve 60 math-circle competition problems the way mathematicians do — Understand, Plan, Execute, Look Back — with hints that only unlock after you put your own thinking into words. Plus a strategy trainer: which first move cracks the problem?

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SplitForge

Ages 10–13 · Gr 5–8 Level 3

Enter your OWN swim/run/bike times and learn the middle-school ratio & percent core through them — pace as a unit rate, percent improvement, negative vs positive splits, yards↔metres, and qualifying cuts as inequalities. Five little coaches, each one math move. On-device, no names, no upload, no AI.

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Math · Ratios, rates and unit rates on factory belts

ProofQuest

Ages 12–13 · Gr 7–8 Level 4

Build mathematical proofs step by step, hunt counterexamples, and practice logical reasoning across 16 kits.

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ConveyorForge

Ages 10–13 · Gr 5–8 Level 3

A factory you can watch. Set the machines, run the belts, find where the line is waiting — then fill the order. Threefer turns 3 ore into 2 plates every 4 seconds: how many machines keep up? Too few and the belt backs up; too many and one sits idle. Ages 9–14.

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Math / History of Mathematics

MasteryForge

Ages 12–13 · Gr 7–8 Level 5

Adaptive math practice that picks your next problem at the edge of what you know — extend, consolidate, or stretch — across fractions, geometry, functions, and more.

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MathLore

Ages 10–13 · Gr 5–8 Level 3

Travel the history of mathematics — from tally marks on the Ishango bone to Ramanujan’s infinite series. Visit five eras, solve the mathematicians’ own problems, order the great discoveries, and practice math history across 16 kits.

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Mathematics · Pop-up engineering: the parallelogram rule

FlickForge

Ages 9–13 · Gr 4–8 Level 3

The physics of the flick, for ages 9–14: predict where a struck disc will come to rest — after it banks off a rail (angle in = angle out), slows to a stop (friction), or passes its momentum to another disc (the carrom strike). You call the landing band, then the deterministic sim reveals the path so you can reconcile. Plus a free table to experiment on. On-device; nothing leaves your device.

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PopForge

Ages 9–13 · Gr 4–8 Level 3

Pop-up engineering. Pick a card, or set the distances and panel lengths yourself, and guess: will it fold flat, poke out of the closed card, or not fold properly? Then open and close it in 3-D and see the rule in numbers: a pop-up works when it's a parallelogram. Print the template, cut, fold and glue.

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CreaseForge

Ages 10–13 · Gr 5–8 Level 4

Every time you fold a piece of paper, you are doing geometry: the crease is a mirror, and whatever was on one side lands as its reflection on the other. Fold across a line and a dot mirrors straight over it; fold one edge onto another and you bisect the angle exactly — no protractor. Predict where a fold lands, then mirror a point yourself in the lab. Real, tiny, deterministic maths — no internet. Ages 9–14.

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Mathematics · geometry: reflections, symmetry lines and the fold-and-cut theorem

MosaicForge

Ages 9–13 · Gr 4–8 Level 3

Tile-laying strategy for ages 9–14: place coloured tiles on a grid to score — a big same-colour CLUSTER, or a MOSAIC bonus for a tile that borders three different colours. Predict the best placement, then the engine reveals every cell’s score so you can reconcile. Plus a free board to build on. On-device; nothing leaves your device.

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OneCutQuest

Ages 9–13 · Gr 4–8 Level 4

Houdini put it in his book of paper tricks: fold a sheet, snip once, open — a perfect star. Fold the paper so every edge of a shape lands on one line, make your one cut, and see what falls out. Then do it with real scissors.

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Mathematics · Fractions and equations: find the line that does not follow

SlateForge

Ages 9–13 · Gr 4–8 Level 3

Scrawl, a young crow, works fraction sums and equations in fast slanted ink, and one line always goes wrong: added the bottoms, forgot to flip, moved a number without changing its sign. Find the line, pick the fix, and tell Scrawl the rule. Then work your own: the margin only says "follows" or "doesn't follow yet". No answers given, nothing leaves your device.

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SextantForge

Ages 10–13 · Gr 5–8 Level 4

How did sailors find their way with no GPS? They read the sky. The North Star’s height above the horizon IS your latitude; a clock set to home turns your local noon into your longitude at 15° an hour. Measure Polaris, predict your position, then check it in the Navigator’s lab. Real, tiny, deterministic maths — angles and time — no internet. Ages 9–14.

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IdentityForge

Ages 11–13 · Gr 6–8 Level 5

See why (a+b)² = a²+2ab+b² — build the box, watch the two twins, and snip-test an identity.

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MentalForge

Ages 9–17 · Gr 4–12 Level 3

Get quick at mental maths — sprints you work out in your head, plus a lab of mental-maths shortcuts shown step by step. An abacus pictures every number. No clock, no pressure, nothing leaves your device.

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ShowMath

Ages 9–17 · Gr 4–12 Level 4

Learn mental-math tricks worth showing off — then actually perform them. Name the weekday of any birthday, reveal a hidden digit, and take a bow. A fresh calendar puzzle every day. On-device, nothing leaves your phone.

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Math · Statistics, Sampling & Fair Tests

CrowdForge

Ages 8–11 · Gr 3–6 Level 3

Run the Commons — a park where 180 little people arrive, queue, and decide. Pull a lever (price · staff · ride speed · game odds · gate fee), predict what happens, then watch. Two meters always watch back: Profit and Fairness. The maths IS the game.

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Solitaire Lab

Ages 11–13 · Gr 6–8 Level 3

Is a rule change good for solitaire? Predict first, then test it on dozens of real deals: the lab plays every deal both ways with a solver that never lies — won, lost, or “not sure yet.” See how sure you can be (with a 95% interval), which deals the rules disagreed on, and why a bigger search finds more wins of the very same deals. Download your table for a science-fair chart. Ages 9–14.

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Reading, writing, grammar, and wordplay.

ELA / Spelling & Word Study

DecodeForge

Ages 9–13 · Gr 4–8 Level 1

Crack the code of hard words — map sounds to spelling tiles, chip long words into syllables, snap prefixes, roots, and suffixes together, and read it smooth. Structured-literacy decoding for readers ages 9–14 who need it, across 16 kits.

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QuillSpell

Ages 9–11 · Gr 4–6 Level 1

Build words from their prefix, root and suffix in Word Forge — then see the word sum, what each part means, and other words that share the root — spell from meanings in the Spell-It Drill, and practice spelling, homophones, roots and etymology across 16 kits. On-device, no accounts, nothing that names you leaves the device.

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WordForge

Ages 9–11 · Gr 4–6 Level 2

A word-puzzle arcade — crack crossword clues, climb word ladders one letter at a time, and rearrange anagram trays, all on a vocabulary, morphology, and etymology curriculum across 16 kits.

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GrammarForge

Ages 9–12 · Gr 4–7 Level 2

Five hands-on skills — punctuation, clauses, style, grammar crimes, parts of speech — plus 16 kits.

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English & Language Arts · voice-first idea capture and drafting (brainstorm → reorder → shape a draft; writing process)

ReadQuest

Ages 9–11 · Gr 4–6 Level 1

Read short passages and answer comprehension questions, with six reading guides who hint when you get stuck.

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RambleForge

Ages 9–13 · Gr 4–8 Level 2

Get every idea out first, then shape it. Capture ideas fast — type or tap 🎤 to speak — then reorder, star the keepers, and drop the rest into a draft you keep. No score, no streak. On-device.

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English / Language Arts — creative writing

TaleForge

Ages 9–13 · Gr 4–8 Level 4

Practice the craft of storytelling — build a story arc with Story Architect, keep an invented world believable in World Keystone, and give every character a distinct voice in Voice Lab, across 16 narrative-craft kits. For young writers ages 9–14.

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Creative Writing

CharacterForge

Ages 10–12 · Gr 5–7 Level 3

Build the people who could be in stories. Practice show-don't-tell — turn a flat feeling word into a detail a reader can see — plus traits, wants, flaws, voice and character arcs. Ages 9–14.

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ELA / Writing craft

DialogueQuest

Ages 10–13 · Gr 5–8 Level 3

Hear each character’s voice, catch what’s NOT being said, punctuate speech the right way, and weigh what every branch of a conversation costs — dialogue-writing craft across 16 kits.

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LoreQuest

Ages 10–13 · Gr 5–8 Level 4

Build branching stories with a live structure meter, sharpen your craft, and explore 16 world-mythology kits.

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ELA / Poetry craft

HaikuQuest

Ages 9–12 · Gr 4–7 Level 2

Write haiku, tanka, cinquain and limericks with a live syllable meter, meet the four craft friends who each teach one poetry skill, and practice counting, forms, season-words and trimming — poetry craft you compose on the page.

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English Language Arts · poetry forms: rhyme, riddle, symbol and nickname in the world's calling games

CallerTales

Ages 9–13 · Gr 4–8 Level 3

One old brass cage has been to every fair on Earth, and every ball is a year. Draw a ball and travel: lô tô at a Mekong fair, a cantor's riddles in Mexico, tombola in Naples, housie on a ship. Play one round the way each place calls it, then write your own calls.

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FigureForge

Ages 11–13 · Gr 6–8 Level 3

Become a Figure Detective — find the metaphor, simile, or idiom hidden in a passage and name it — then practice all 13 devices across 16 kits.

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MythForge

Ages 10–12 · Gr 5–7 Level 2

Battle the creatures of myth with your knowledge, explore the family tree of the gods, and learn Greek, Norse, Egyptian & world mythology across 16 kits.

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English / Language Arts — Data Journalism

JestForge

Ages 10–13 · Gr 5–8 Level 3

Write jokes with a live structure meter, spot the punchline that lands, and practice comedy-writing craft across 16 kits.

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InkQuest

Ages 9–13 · Gr 4–8 Level 4

Be a junior investigative journalist: read the data behind a story, pick the headline the numbers actually support, spot the misleading framing, and link every claim to the evidence that backs it up.

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English & Language Arts / Speaking & Listening

SpeakForge

Ages 9–12 · Gr 4–7 Level 3

Assemble a talk from its parts — hook, point, evidence, close — and watch a live meter show how strong its structure is, then sharpen your listening by picking the best follow-up question or paraphrase. Plus 16 kits of speaking and listening questions, from voice projection to formal debate. On-device, no accounts, no microphone.

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English Language Arts — oral storytelling craft

VoiceTale

Ages 9–12 · Gr 4–7 Level 3

Oral-storytelling craft — 16 kits, build the 5-beat arc (hook·setup·rising·turn·close), and coach the delivery of a told tale.

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World Languages / Linguistics

LinguaQuest

Ages 10–12 · Gr 5–7 Level 4

Be a language detective: step into scenes around the world and pick the right thing to say, spot true cognates from sneaky “false friends,” and explore how the world’s languages are related — families, writing systems, and words that travel. Plus 16 kits of comparative-linguistics questions. On-device, no accounts.

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MorphQuest

Ages 9–13 · Gr 4–8 Level 3

Fuse Greek + Latin word-parts to spawn Morpheme Monsters — chrono + phage births a time-eater. Master the roots, prefixes & suffixes that unlock thousands of words, then decode a word you have never seen. 16 morphology & etymology missions.

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English & Language Arts · reading & summarizing — write a summary of a passage, then see what your summary dropped (summary-loss literacy: the number, the caveat, the cause, the who, the contrast)

EditQuest

Ages 9–13 · Gr 4–8 Level 3

You are the teacher now — grade a confident-but-wrong robot, mark ✓/✗, and write the fix. 16 editing & proofreading missions: punctuation, agreement, spelling-in-context, and sentence clarity.

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GistForge

Ages 9–13 · Gr 4–8 Level 2

Read a short passage, write a summary, and Tote — a friendly novice who reads only your card — holds only the ideas your words carried. What Tote cannot hold is what your summary dropped, and the five losses show it: the number, the caveat, the cause, the who, and the contrast. Then rescue a loss and check again. On this device, no account, no feed, no real brands. Just you, an idea, and how much of it your summary really keeps.

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English Language Arts · Drafting and critique

SixDrafts

Ages 9–13 · Gr 4–8 Level 3

Make one real thing six times. A partner leaves one kind, specific note from set starters after each draft, and the six lie side by side at the end, so the change speaks for itself. Kept on this device. Ages 9–14.

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English & Language Arts · reading fluency (same-language subtitles, read-along)

CaptionQuest

Ages 9–13 · Gr 4–8 Level 2

Read along with a story, then take over, for ages 9–14. A cast chapter plays with its words lit up. Choose how much the narrator reads, or take a part in a short drama: on your lines the story pauses and you read on. No score, no timer, nothing recorded.

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English Language Arts · Summarising for a real reader

SproutForge

Ages 9–13 · Gr 4–8 Level 3

Take a story you read and write it short for one particular younger child: about 250 words. A sprout meter droops when it runs long, and a checklist from the book's Honest Page makes sure every true line stays true. Then read it to them. Ages 9–14.

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BuddyQuest

Ages 9–13 · Gr 4–8 Level 2

Become a reading coach — for ages 9–14. Poco, a younger reader, gets a little stuck on a word, and YOU pick the best way to help: say the sound, model the blend, tap it out, or cheer the strategy. Coaching a reader is one of the best ways to lock the sounds in for yourself. Print a session card and run it with a younger buddy. No score, no rush; on-device, nothing leaves your device.

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LexiTales

Ages 9–13 · Gr 4–8 Level 3

A word-tile board game for ages 9–14: place letter tiles on the board to build interlocking words and score — premium squares reward smart placement, and a friendly, level-pickable bot plays a real game with you. Pass-and-play with a friend, play one on another device by room code, or take the solo best-word puzzle. Solo and pass-and-play run on your device; in a room-code game only your moves pass through our server, with no names.

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English & Language Arts / vocabulary × spatial strategy

HintForge

Ages 9–13 · Gr 4–8 Level 3

A word-connection game for ages 9–14: nine words hide three groups that share a meaning — find them. The twist: you can only play a word once you've shown you know what it means (the Meaning Rule). Trains vocabulary by meaning, not by spelling. On-device; nothing leaves your device.

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SpanForge

Ages 9–13 · Gr 4–8 Level 3

Spell a path, span the board. On a honeycomb of letter tiles, trace a real word along touching tiles — every tile you cross becomes yours, then you say what the word means. First to connect your two sides with your tiles wins. The child who knows RIVET and TRIVET has more paths! When the words run low the game turns into pure Hex — a lesson about resources. On-device, no accounts, no ads.

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LensQuest

Ages 9–13 · Gr 4–8 Level 3

A window was left open, a coat went missing, a crash rang out — and four kids each tell you what happened. Nobody’s lying, but they were standing in different places, so their stories don’t all match. Which two agree? Which two can’t both be true? Who’s claiming something they couldn’t possibly have seen? Read across all four, drop the guesses, keep what the real witnesses agree on — and write the fifth account: what actually happened. A tiny, deterministic point-of-view engine, no internet. Ages 9–14.

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CircleQuest

Ages 9–13 · Gr 4–8 Level 3

Five readers, one passage, five jobs. Someone names the main event, someone links it to the world, someone asks a question the text can answer, someone pins the hard word, someone pictures the vivid moment. Nobody reads the whole thing alone — the full understanding is what you get when you put the slices together. Spot the claim that overreaches (sounds like a reading but invents a detail), and see why one vivid image, read by itself, can point the wrong way. A tiny, deterministic literature-circle engine, no internet. Ages 9–14.

Play CircleQuest →